Project 1 - Creation of user defined data type to implement the user interfaces for working with ‘Set’ (Mathematical Set theory) using Linked List

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
// Linked list node with integer data
struct Node {
int data;
struct Node* next;
};
//function declaration
void push(struct Node** head_ref, int new_data);
int isPresent(struct Node* head, int data);
// Function to get union of two linked lists head1 and head2
struct Node* getUnion(struct Node* head1, struct Node* head2)
{
struct Node* result = NULL;
struct Node *t1 = head1, *t2 = head2;
// Insert all elements of list1 to the result list
while (t1 != NULL)
{
push(&result, t1->data);//transfering compare value
t1 = t1->next;
}
// Insert those elements of list2 which are not present in result list
while (t2 != NULL)
{
if (!isPresent(result, t2->data))
{
push(&result, t2->data);
}
t2 = t2->next;
}
return result;
}
// Function to get intersection of two linked lists head1 and head2
struct Node* getIntersection(struct Node* head1, struct Node* head2)
{
struct Node* result = NULL;
struct Node* t1 = head1;
// Traverse list1 and search each element of it in list2. If the element is present in list 2, then insert the element to result
while (t1 != NULL)
{
if (isPresent(head2, t1->data))
{
push(&result, t1->data);
}
t1 = t1->next;
}
return result;
}
// A utility function to insert a node at the beginning of a linked list
void push(struct Node** head_ref, int new_data)
{
// allocate node
struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));
// put in the data
new_node->data = new_data;
// link the old list off the new node
new_node->next = (*head_ref);
// move the head to point to the new node
(*head_ref) = new_node;
}
// function to print a linked list
void printList(struct Node* node)
{
while (node != NULL)
{
printf("%d ", node->data);
node = node->next;
}
}
// function that returns true if data is present in linked list else return false
int isPresent(struct Node* head, int data)
{
struct Node* t = head;
while (t != NULL)
{
if (t->data == data)
{
return 1;
}
t = t->next;
}
return 0;
}
// Driver program to test above function
int main()
{
int n,m,t;
printf("enter the value of number of value in link list(both):-");
fflush(stdout);
scanf("%d %d", &n, &m);
// Starth structure pointer with the empty list
struct Node* head1 = NULL;
struct Node* head2 = NULL;
struct Node* intersecn = NULL;
struct Node* unin = NULL;
//for loop for link list1
for(int i=0;i<n;i++)
{
printf("Enter the value in link list1 %d:-",i);
fflush(stdout);
scanf("%d", &t);
push(&head1, t);
}
//for loop for link list2
for(int i=0;i<m;i++)
{
printf("Enter the value in link list2 %d:-",i);
fflush(stdout);
scanf("%d", &t);
push(&head2, t);

}
//call the function of intersection
intersecn = getIntersection(head1, head2);
//call the function of union
unin = getUnion(head1, head2);
printf("\n First list is ");
//function calling with structure pointer as argument
printList(head1);
printf("\n Second list is ");
printList(head2);
printf("\n Intersection list is ");
printList(intersecn);
printf("\n Union list is ");
printList(unin);
return 0;
}

O/P :

enter the value of number of value in link list(both):-4 5
Enter the value in link list1 0:-1
Enter the value in link list1 1:-2
Enter the value in link list1 2:-3
Enter the value in link list1 3:-4
Enter the value in link list2 0:-1
Enter the value in link list2 1:-2
Enter the value in link list2 2:-3
Enter the value in link list2 3:-4
Enter the value in link list2 4:-5

First list is 4 3 2 1
Second list is 5 4 3 2 1
Intersection list is 1 2 3 4
Union list is 5 1 2 3 4